[clang] [Clang][Interp] Diagnose use sizeless vector type as the argument of `__builtin_vectorelements` (PR #99794)

[Timm Baeder via cfe-commits]

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@@ -29,6 +29,7 @@
 #include "State.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Expr.h"
+#include "clang/Basic/DiagnosticSema.h"
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tbaederr wrote:

What do we need this include for?

https://github.com/llvm/llvm-project/pull/99794